Most paper puppets i've come across use fasteners such as brads, but they can be seen from the front as well. Here's an example http://4.bp.blogspot.com/_fOUL6EnleRs/SsYYxV_u4LI/AAAAAAAAAm0/yfONUxYphmI/s400/IMG_1161.JPG. However recently I discovered this stop motion animation where the fasteners could not be seen on the front of the puppet, http://vimeo.com/26085766. As you can see around 2:16 the artist has used some kind of fastener that's only connected at the back of the paper doll.
I've spend the last 2 days trying to find answers on the internet but with no luck.
I hope someone can give me an idea of how to achieve this?